Nondestructive evaluation of surface crack depth in concrete
Küçük Resim Yok
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Subsurface damages in concrete may cause considerable durability loss in the structure since they are not visible from the surface and let water and other chemicals to penetrate into the structure and cause reinforcement corrosion. Ultrasonic methods have been widely applied for defect detection in concrete, however, there are not many applications of the method found in literature for subsurface damage identification. Specifically, when the damage is deeper considering the distance from the top surface. Therefore, in this study concrete blocks including subsurface cracks with different depths as well as a sound concrete block were tested by applying ultrasound. Wave parameters such as velocity and attenuation for each case were evaluated. Rayleigh wave and longitudinal wave velocities do not change for different subsurface crack depths. Even though, wave energy attenuates more in case of a shallower crack, it is difficult to correlate the attenuation rate with crack depth. Still, attenuation rate is an indicative parameter for subsurface damage identification. Numerical results obtained by Boundary Element Method (BEM) analysis are in good agreement with experimental ones. Stack imaging procedure applied to ultrasonic echo data is used as a complementary technique for subsurface crack depth identification. Reflection at the crack depth can be clearly identified. © The Society for Experimental Mechanics, Inc. 2013.
Açıklama
Bruel and Kjaer;m+p international;Vibrant Technology;Spectral Dynamics;SQi Spectra Quest, Inc.
31st International Modal Analysis Conference on Structural Dynamics, IMAC 2013 -- 11 February 2013 through 14 February 2013 -- Garden Grove, CA -- 98886
31st International Modal Analysis Conference on Structural Dynamics, IMAC 2013 -- 11 February 2013 through 14 February 2013 -- Garden Grove, CA -- 98886
Anahtar Kelimeler
BEM, NDE, SAFT, Surface crack, Ultrasound
Kaynak
Conference Proceedings of the Society for Experimental Mechanics Series
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
39
Sayı
4
